Cathodal tDCS of the Left Posterior Parietal Cortex Increases Proprioceptive Drift

Oliveira, João Roberto Ventura de; Romano-Silva, Marco Aurélio; Ugrinowitsch, Herbert; Apolinário-Souza, Tércio; Fernandes, Lidiane Aparecida; Parma, Juliana Otoni; Lage, Guilherme Menezes

doi:10.1080/00222895.2018.1468311

Cited by 9 publications

(8 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, previous studies on somatosensory information processing in the brain showed that the left PPC is activated during a crossed-hand posture (36) and light touch with EC (5). C-tDCS of the left PPC was also reported to increase the limb position drift away from the defined target without visual feedback (19). The left inferior parietal lobule was activated during both hand-object illusions with the right and left hands, and the activity was greater than that in the right corresponding parietal region, suggesting a dominant role for the left hemisphere (37).…”

Section: Discussionmentioning

confidence: 99%

“…C-tDCS was applied at 1.5 mA for 15 minutes (the impedance was maintained below 5 kΩ), with 5 s of ramping up and down, in accordance with the protocol described in previous studies (9) (17). The positions of the stimulation electrodes were adopted from previous studies (9, 19, 20). The tDCS cathodal electrode (surface area: 35 cm 2 , 7 × 5 cm) was placed at P3 or P4 according to the International 10-20 system, and the anodal electrode (surface area: 35 cm 2 , 7 × 5 cm) was placed in the contralateral orbit.…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies, unilateral cathodal (C)-tDCS has been used to modify information processing in the hemisphere (9) (19). On the other hand, bilateral tDCS has been used in studies of bilateral cerebral hemispheric effects (9) (20).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates on postural control depending with eyes open and closed

Oka¹,

Ikeda

Mitsutake

et al. 2022

Preprint

View full text Add to dashboard Cite

Cathodal transcranial direct current stimulation (C-tDCS) is generally assumed to inhibit cortical excitability. The parietal cortex contributes to multisensory information processing in the postural control system, and this processing is proposed to be different between the right and left hemispheres and sensory modality. However, previous studies did not clarify whether the effects of unilateral C-tDCS of the parietal cortex on the postural control system differ depending on the hemisphere. We investigated the changes in static postural stability after unilateral C-tDCS of the parietal cortex. Ten healthy right-handed participants were recruited for right- and left-hemisphere tDCS and sham stimulation, respectively. The cathodal electrode was placed on either the right or left parietal area, whereas the anodal electrode was placed on the contralateral forehead. We evaluated static standing balance by measuring the sway path length, mediolateral (ML) sway, anteroposterior (AP) sway, sway area, and the sway path length per unit area (L/A) after 15-minute C-tDCS under eyes open (EO) and closed (EC) conditions. C-tDCS over the right hemisphere significantly increased the sway path length, ML sway, and sway area in the EO condition. In contrast, C-tDCS over the left hemisphere significantly increased the L/A in both the EC and EO condition. These results suggest that the right parietal region contributes to static standing balance through chiefly visual information processing during the EO condition. On the other hand, L/A increase during EC and EO by tDCS over the left parietal region depends more on somatosensory information to maintain static standing balance during the EC condition.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates on postural control depending with eyes open and closed

Oka¹,

Ikeda

Mitsutake

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…More specifically, the posterior parietal cortex (PPC) stands out for its importance in the formation of sensory representations that are involved in both movement planning and error corrections. 19 In motor adaptation tasks the unpredictability of perturbations under random practice, forces the learner to correct their movements during the execution requiring more from perceptual processes, and consequently, from brains areas involved in processing online feedback. 17 Surprisingly, after these two studies in 2017, three new studies investigating perceptual processes in practice organization were published in 2018.…”

Section: Practice Organization: Could Perceptual Processes Be Affected?mentioning

confidence: 99%

Mini-Review: practice organization beyond memory processes

Lage¹,

Fernandes

Apolinário-Souza

et al. 2021

BJMB

Self Cite

View full text Add to dashboard Cite

Background: The benefits of variable practice in motor learning have been traditionally explained by the increased demand for memory processes induced by trial-to-trial changes. Recently, a new perspective associating increased demand for perception with variable practice has emerged. Aim: This revision aims to present and discuss the findings in this exciting topic newly opened. Results / Interpretation: In the second half of 2010’s, a number of studies have pointed out differences in perceptual processing when compared variable and repetitive practices. Different levels of (a) hemodynamic activation, (b) electroencephalographic activity, (c) neurochemical activity, and (d) oculomotor behavior have provided evidence that perceptual processes are affected differently by variable and repetitive practices.

show abstract

“…Clarification of the functional relationship between brain dominance and standing posture control can reveal the influence of brain dysfunction on WBA in lateropulsion patients and lead to the development of neurorehabilitation protocols for parietal lobe dysfunction. In previous studies, unilateral cathodal (C)-tDCS has been used to modify information processing in the right or left hemisphere [ 9 , 19 ]. On the other hand, bilateral tDCS has been used in studies of bilateral cerebral hemispheric effects [ 9 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates postural control depending with eyes open and closed

Oka¹,

Ikeda

Mitsutake

et al. 2022

PLoS ONE

View full text Add to dashboard Cite

Objective Cathodal transcranial direct current stimulation (C-tDCS) is generally assumed to inhibit cortical excitability. The parietal cortex contributes to multisensory information processing in the postural control system, and this processing is proposed to be different between the right and left hemispheres and sensory modality. However, previous studies did not clarify whether the effects of unilateral C-tDCS of the parietal cortex on the postural control system differ depending on the hemisphere. We investigated the changes in static postural stability after unilateral C-tDCS of the parietal cortex. Methods Ten healthy right-handed participants were recruited for right- and left-hemisphere tDCS and sham stimulation, respectively. The cathodal electrode was placed on either the right or left parietal area, whereas the anodal electrode was placed over the contralateral orbit. tDCS was applied at 1.5 mA for 15 min. We evaluated static standing balance by measuring the sway path length (SPL), mediolateral sway path length (ML-SPL), anteroposterior sway path length (AP-SPL), sway area, and the SPL per unit area (L/A) after 15-minute C-tDCS under eyes open (EO) and closed (EC) conditions. To evaluate the effects of C-tDCS on pre- and post-offline trials, each parameter was compared using two-way repeated-measures analysis of variance (ANOVA) with factors of intervention and time. A post-hoc evaluation was performed using a paired t-test. The effect sizes were evaluated according to standardized size-effect indices of partial eta-squared (ηp2) and Cohen’s d. The power analysis was calculated (1-β). Results A significant interaction was observed between intervention and time for SPL (F (2, 27) = 4.740, p = 0.017, ηp2 = 0.260), ML-SPL (F (2, 27) = 4.926, p = 0.015, ηp2 = 0.267), and sway area (F (2, 27) = 9.624, p = 0.001, ηp2 = 0.416) in the EO condition. C-tDCS over the right hemisphere significantly increased the SPL (p < 0.01, d = 0.51), ML-SPL (p < 0.01, d = 0.52), and sway area (p < 0.05, d = 0.83) in the EO condition. In contrast, C-tDCS over the left hemisphere significantly increased the L/A in both the EC and EO condition (EO; p < 0.05, d = 0.67, EC; p < 0.05, d = 0.57). Conclusion These results suggest that the right parietal region contributes to static standing balance through chiefly visual information processing during the EO condition. On the other hand, L/A increase during EC and EO by tDCS over the left parietal region depends more on somatosensory information to maintain static standing balance during the EC condition.

show abstract

Cathodal tDCS of the Left Posterior Parietal Cortex Increases Proprioceptive Drift

Cited by 9 publications

References 44 publications

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates on postural control depending with eyes open and closed

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates on postural control depending with eyes open and closed

Mini-Review: practice organization beyond memory processes

Unilateral cathodal transcranial direct current stimulation over the parietal area modulates postural control depending with eyes open and closed

Contact Info

Product

Resources

About